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https://issues.apache.org/jira/browse/TAJO-1514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14395450#comment-14395450
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ASF GitHub Bot commented on TAJO-1514:
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Github user hyunsik commented on the pull request:
https://github.com/apache/tajo/pull/505#issuecomment-89479419
Unfortunately, I have enough time to review this patch. I'm sorry. I
roughly looked over your approach. It looks nice to me.
> Distinguish UNION and UNION ALL
> -------------------------------
>
> Key: TAJO-1514
> URL: https://issues.apache.org/jira/browse/TAJO-1514
> Project: Tajo
> Issue Type: Sub-task
> Reporter: Keuntae Park
> Assignee: Keuntae Park
>
> Currently, Tajo handles both UNION and UNION ALL as UNION ALL.
> For UNION, however, result should not have duplicated rows.
> It needs to handle them differently.
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